Stanislaus kttcharski



Dec. 23, 1924- v Q 1,520,658

S. KUCHARSKI FILM FEED MECHANISM FOR PHOTOGRAPHIC CAMERAS FilecLMarglTJi), 1923 fmleniar Alb/way.

Patented Dec. 23, 1924.

UNITED STATES PATENT OFFICE.

STANISLAUS KUCHARSKI, O35 CHARLOTTENBURG, GERMANY, ASSIGNOR TO ALFRED HUBER AND WOLFGANG SIMONS, OF BERNE, SWITZERLAND.

FILM-FEED MECHANISM FOR PHOTOGRAPHIC CAMERAS.

Application filed March 19, 1923,

To all whom it may concern:

Be it known that l, STANISLAUS Keenan- SKI, a citizen of the German Republic, residing at (lharlottenburg, Germany, have invented new and useful Im n'ovements in Film-Feed l\ [echanisin tor Photographic Cameras, of which the following is a specification.

ln photographic apparatus for producing a considerable number or individual views on roll-films it is advantageous to produce the film-feed by simple motions of a drawbar regulated so to obtain uniform lengths of pictures. The present improvements attain this object in a very simple manner by causing the drawbar to advance the film-feed drum by means of a flexible band, for one image atter another and by providing a film-teed regulating d vice for autoujiatically adjustable film transporting device adapted to produce uniform lengths of pictures in spite of increasing diameter of the drum and with very simple means.

The drawing shows an example oi": construction embodying the invention.

lo the interior of a camera-body a, are located two drums carrying a lilm adapted to be fed forward by the up and down mo tion of a drawlmr On the drum (3 is wound the unexposed negative film. The dotted line (Z indicates the course of the film towards the lower drum. The latter is mounted on a transporting disc 9 by means of a pair of driving studs or pins 0 and f. This transporting disc is surrounded by a toothed ring 7*, adapted to turn the transportiir disc in one direction by means of a rate et pawl 71. On the outside of the toothed disc it there is a flexible band is attached to it at 7/. One end of the band is fixed on the axle of the drum 0 by means of spiral shaped elastic windings or spring coils m, and the other end of the band is fixed to the drawbar 7). The latter carries a spring pawl 42 which at every downmotion of the said bar turns a tooth wheel or counting disc in carrying a counting disc forward one tooth, the accidental return motion of the counting disc m being prevented by a pawl a, While a pawl 0 is provided to prevent the transporting drum from sliding back,

On the toothed disc on is fixed a cam 3) al u ated in, such a ma ner that it serves Serial No. 626,207.

to limit the stroke oi the drawbar b by the impact of the pin with the hook-shaped end if ot the lever r, the time of which im pact depends on the position of the levers and r.

The iosition ot the lever 9, which has a pad H kept in contact with the circumference oi, the coin p is adjusted by the turn ,ing oi the cam. Every turning oi? the cam by the downniotion ot the drawbar I) adjusts the position oi the lever r for the subse quent upmotion of the drawbar, and consequently the lei'igth of the stroke of the latter.

A spring ;1 attached to the lever r and the bar is provided for balancing the weight of the levers Q and r and pressing the pad in against the cam 79.

That I claim is:

l. in a roll-film photographic apparatus, a llllll holding and transporting mechanism comprising in its construction a pair of parallel drums viz. a delivery drum and a receiving drum, an axle on which said delivery drum is monntech a spiral spring coiled on said axle, a transporting disc adapted to turn the receiving drum a drawl'iar movable longitudinally by hand a tlexiigile transporting hand attached at one end to the said drawbar and at the other end to said spiral spring the said transporting band being guided over the circumference of the transporting disc and adapted to impart motion to the said disc, an adjustable abutment adapted to limit the stroke of the said drawbar, and a regulating device adapted to adjust the position of the said abutment at every stroke of the drawbar in one direction and to shorten the subsequent stroke of the same. in the opposite direction substantially as described.

2. In a roll film photographic camera, a film holding and transporhng mechanism comprising a pair of parallel film holding and transporting drums, viz. a delivery drum and a receiving drunn an axle on which said delivery drum is inoinited. a spiral spring coiled on said axle, a longitudinally movable draw bar adapted to be operated by hand, a flexible transporting band attached atone end to the draw bar and at the other end to said spiral spring, a transporting disc connected with the receiving drum over the circumference of which disc the said transporting band is go.' d a cam and earn shaft adapted to be turned forward at every inward stroke oi the draw bar, an abutment adapted to limit the stroke of the draw liar, and mechanism adapted to be adjusted at ever motion ot the cam so as to displace said abutment.

3. In a roll-film photographic camera, a film holding and transporting mechanism comprising a delivery drum, an axle on which said deliver drum is mounted, a spiral spring coiled on said axle, a transporting disc parallel to the said delivery drum, a film drum detachabl v mounted on the said transporting disc, a draw bar, a flexible driving band attached, at one end to said drawbar and at the other end to said spiral spring. the said transporting band being guided over the circumference of the said transporting disc and. adapted to turn it while travelling towards the receiving drum, a cam-shaft carrying a regulating cam an ratchet-wheel located between the two drums, a ratchet pawl attached to the drawbar and adapted to turn the ratchet wheel forward one division at every return stroke oi the drawbar, thereby adjusting the position of the cam so that it limits the subsequent tor-ward stroke and an abutment de vice adapted to limit the stroke of the drawbar according to the position of the regulating cam, substantially as described.

In testimony whereof I have hereunto set my hand.

STANISLAUS KUUHARSKT \Vitnesses HENRY HUBER, CARL MnRBnrN. 

